LONGPTRpData

LONGPTRpData is not a standard C/C++ type. It is a project-specific name used to describe a data type that holds either a pointer to data or a pointer-sized numeric value. The exact meaning and definition of LONGPTRpData vary by codebase, so its interpretation should be taken from the surrounding declarations and documentation.

Two common interpretations appear in practice. In some code, LONGPTRpData is defined as a pointer-sized signed integer, for example using intptr_t or a Windows-like LONG_PTR, to store addresses or small, pointer-sized values in a single variable. In other codebases, LONGPTRpData is defined as a plain pointer to data, such as void*, indicating that the variable holds an address to a data buffer or an opaque handle. The choice affects how the type can be used: as an integer for arithmetic and interop, or as a direct data pointer for dereferencing and data access.

Typical usage scenarios include inter-module communication where a single variable must carry a platform-sized address, interoperation with APIs that require pointer-sized parameters, and serialization or cross-language boundaries where addresses are treated as opaque handles. When defining LONGPTRpData, programmers should consider portability and intent: if the value represents an address, prefer a pointer-sized integer type like intptr_t/uintptr_t; if it represents a data reference, prefer a void* or appropriate data-pointer type. Documentation within the codebase is essential to prevent confusion between numeric handles and actual pointers.

See also: LONG_PTR, intptr_t, uintptr_t, LPARAM, pointer-sized types.